毕业设计cass工艺处理生活污水辽工大

中文题目：阜新市5万m3·d﹣1生活污水处理CASS工艺设计外文题目：THEFUXINCITY50000m3•d1SEWAGETREATMENTPLANTCASSPROCESSDESIGN毕业设计（论文）共页图纸共张完成日期2013年6月答辩日期2013年7月II摘要本设计主要工艺是使用CASS技术处理生活污水。循环活性污泥法CASS工艺是一种将变容积活性污泥法和生物选择器原理有机的结合起来，具有同步脱氮除磷的特点，并以序批曝气-非曝气方式运行的间歇活性污泥处理工艺。本设计在总体布局上简单有序，在进水口设置格栅，主要除去污水中较大的漂浮物和悬浮物；接下来设置两座沉砂池，主要除去污水中细小的无机颗粒；还设置了滤池，处理方法除去污水中的悬浮物；并且本设计设置CASS工艺作为除去污水中有机物的生物处理工艺。CASS池的前部是生物选择区，即预反应区，后部为主反应区，其主反应区后装了可升降自动撇水装置。整个工艺的曝气、沉淀、排水在同一池子内周期循环运行，省去了常规活性污泥法的二沉池和污泥回流系统;同时可连续进水，间断排水。关键词：CASS工艺;处理生活污水;连续进水;间断排水IIIAbstractCASScycleactivatedsludgeshortisdevelopedonthebasisoftheSBRprocess.ThatisabiologicalselectorincreaseinSBRpoolwaterside,toachieveacontinuousflow,intermittentdrainage.Themainpurposeofthebio-selectoristoenablethesystemtochooseaflocculationbacterium,itsvolumetoabout10%oftheentirepond.Biologicalselectionprocesstofollowtheaccumulationofactivatedsludgematrix-reproductiontheory,sothattheactivatedsludgeintheadsorptionprocesswhereinexperiencingahighload,thenintheprimaryreactionzonethroughalowerloadmatrixdegradationstage,inordertocompletetheentirethewholeprocessofmatrixdegradationandsludgeregeneration.Theprocessasearlyasapplicationsinforeigncountries,inordertobetteritsintroductiondigestiondevelopmentofanewsewagetreatmentprocesssuitableforChina'snationalconditions,theGeneralArmamentDepartment,EngineeringandResearchInstituteEnvironmentalProtectionCenterin1994inthelaboratoryoftheentiresystemsimulationexperiment,investigatetheeffectofnitrogenandphosphorusremovalmechanismandcharacteristicsoftheCASSprocessatroomtemperaturesewage,colddomesticsewage,pharmaceuticalandchemicalindustrialwastewatertreatmentprocess,valuabledesignparametersandprocessoperationguidingexperience.CASSfrontofthepoolareaofbiologicalselectionprocreationzone,therearofthemainreactionzone,thewatercanberaisedandloweredautomaticallywritedeviceisinstalledinthemainreactionzone.Theentireprocessofaerationsedimentationdrainageruninthesamepondcycle,eliminatingtheneedforconventionalactivatedsludgesecondarysedimentationtankandsludgereturnsystem;continuouswater,intermittentdrainage.Keywords:CASSprocess;cycleactivatedsludge;continuouswater;intermittentdrainageIV前言从总体上看，我国是一个水资源贫乏的国家，人均占有水资源量只有世界平均水平的1/4，在世界银行连续统计的153个国家中居世界第八十八位。按目前的正常需要和不超过地下水，全国年缺水总量约为300亿～到400亿立方米。同时水资源在时间和空间上分布不平衡。有限的水资源总量中60％～70％是难以控制和利用的洪水，黄淮海流域入口，粮食产量和国内生产总值运站全国的2/3左右，但其多年平均水资源量站全国的7.2％。专家预计，2030年我国跟口将接近16亿，城市化水平将达52％，在充分考虑节水病扣除必须的生态环境需水后，全国预计的用水量已经接近河里利用水量的上限，从一定意义上说，水资源短缺已经成为国民经济和社会发展的主要因素。水体污染包括地表水污染和地下水污染两部分，生产过程中生产的工业废水，工业垃圾、工业废气、生活污水和生活垃圾都能通过不同渗透方式造成水资源的污染。长期以来，用于工业生产污水直接外派而引起的环境事业屡见不鲜，它给人类生产、生活带来极坏的影响，因此，应当对生产、生活中的排放的废水加以控制V目录摘要.................................................................................................................................................IIAbstract...........................................................................................................................................III前言................................................................................................................................................IV1概论..............................................................................................................................................11.1设计任务............................................................................................................................11.2设计要求............................................................................................................................11.3设计基础资料...................................................................................................................11.3.1项目概况...............................................................................................................11.3.2水质情况...............................................................................................................11.4污水的主要来源...............................................................................................................21.5环境概况...........................................................................................................................21.6污水处理厂厂址...............................................................................................................22.污水处理系统.............................................................................................................................32.1处理程度计算..................................................................................................................32.1.1CODcr的处理程度..................................................................................................32.1.2溶解性BOD5的处理程度......................................................................................32.1.3SS的处理程度......................................................................................................32.1.4NH3-N的处理程度.................................................................................................42.1.5TP的处理程度......................................................................................................42